The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 22, 1991
Filed:
Oct. 18, 1989
Werner Schneider, Quickborn, DE;
Horst Borowski, Hamburg, DE;
Erwin Kausch, Jesteburg, DE;
Rolf Kutting, Jesteburg, DE;
Meinhard Meyer, Appen-Unterglinde, DE;
Knut Moller, Hamburg, DE;
Bernd-Henrik Muller, Hamburg, DE;
Adolf Schluter, Quickborn, DE;
B.A.T. Cigarettenfabriken GmbH, Hamburg, DE;
Abstract
A coaxial cigarette comprising an inner core of a material glowing away substantially without residue, in particular tobacco material, with a sheath for the inner core, an outer jacket coaxially surrounding the inner core and its sheath and comprising a tobacco and/or non-tobacco material, and a sheath for the outer jacket, has a diameter of the inner core which lies in the range from 45% to 80% of the outer diameter of the coaxial cigarette; the inner core has a packing density in the range from 300 to 400 mg/cm.sup.3 ; the outer jacket has a packing density in the rnage from 170 to 250 mg/cm.sup.3. The sheath of the inner core has an air permeability of less than 3 ISO units. The outer sheath has a front segment to be lit and a rear mouth-side segment; the front ignition-side segment of the outer sheath contains conventional glow salts and has an air permeability of 15 to 40 ISO units and the rear mouth-side segment of the outer sheath contains no glow salts and has an air permeability of less than 3 ISO units.